A bank has $200 million in assets in the 0 percent risk-weight category. It has $400 million in assets in the 20 percent risk-weight category. It has $1,000 million in assets in the 50 percent risk-weight category and has $1,000 million in assets in the 100 percent risk-weight category. This bank has $96 million in Tier 1 capital and $48 million in Tier 2 capital. What is this bank's ratio of Tier 1 capital to risk assets? A. 6.08 percent B. 3.04 percent C. 9.11 percent D. 5.54 percent E. None of the options is correct.

I want to know why is the answer A how do we solve it?